EP0486904A1 - Method and installation for waste paper processing - Google Patents

Method and installation for waste paper processing Download PDF

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Publication number
EP0486904A1
EP0486904A1 EP19910119108 EP91119108A EP0486904A1 EP 0486904 A1 EP0486904 A1 EP 0486904A1 EP 19910119108 EP19910119108 EP 19910119108 EP 91119108 A EP91119108 A EP 91119108A EP 0486904 A1 EP0486904 A1 EP 0486904A1
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EP
European Patent Office
Prior art keywords
waste paper
soaking
stage
drum
sorting
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Granted
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EP19910119108
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German (de)
French (fr)
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EP0486904B1 (en
Inventor
Herbert Dr. Ortner
Theodor Bähr
Walter Musselmann
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JM Voith GmbH
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JM Voith GmbH
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
    • D21B1/08—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods the raw material being waste paper; the raw material being rags
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/32—Defibrating by other means of waste paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/02—Working-up waste paper
    • D21C5/025—De-inking
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Definitions

  • the invention relates to a method according to the preamble of claim 1 and arrangements for performing the method.
  • a method is known from DE-OS 30 40 998.
  • the soaking takes place in a drum rotatable about a horizontal axis.
  • the consistency for the soaking process is 20 to 40%.
  • the waste paper is then greatly diluted with water, so that a further sorting process can take place in a drum which is rotatable about a horizontal axis and provided with perforations in the screen and has a consistency of between 8 and 12%.
  • the hole sizes are 4 to 12 mm in diameter.
  • the ink binders are softened to such an extent that the ink particles can be separated from the fibers more effectively in the subsequent dissolving process than is the case without "pre-impregnation”.
  • Pre-impregnation is best done with a consistency of more than 12%.
  • the patent specification DE 35 22 395 C1 provides that the waste paper is also "pre-soaked", stacked in a reaction tower and dissolved in the lower part of the tower by means of a cloth dissolver, whereby gross contamination of the waste paper, e.g. Plastic films, pieces of wire and the like are continuously removed from the fiber suspension.
  • This method has the disadvantage that only a small proportion of impurities may be present in the waste paper, because e.g. If the proportion is higher than 1% (based on otro waste paper), bridging, clogging, etc. can occur in the lower part of the tower, the removal of which can only be carried out in a time-consuming manner, with considerable production losses.
  • the object of the invention is to carry out the removal of the printing inks very efficiently and effectively when processing waste paper which contains a very high proportion of paper printed with printing inks. No further pre-sorting of the waste paper should be necessary, so that all impurities can also get into the reprocessing process. Furthermore, the expenditure of time and the expenditure of chemicals should also be relatively cheap.
  • the process described here avoids the above disadvantages, since in this case the contaminations and any waste paper containing wire pieces are treated in a pre-soaking drum at fabric densities> 12% and temperatures> 18 ° C in the presence of chemicals for more than 20 minutes and the coarse contaminants contained afterwards on this, if necessary without intermediate dilution using a coarse sorting drum or coarse sorting device (e.g. plan sorter or the like with a consistency of at least 13% (based on otro waste paper fibers unresolved pieces of waste paper are discarded with the reject).
  • a coarse sorting drum or coarse sorting device e.g. plan sorter or the like with a consistency of at least 13% (based on otro waste paper fibers unresolved pieces of waste paper are discarded with the reject
  • the still undiluted accept is further processed in a third drum or a fabric dissolver, if necessary, and pumpable dissolved, with additional printing ink detaching and / or bleaching chemicals possibly being added to this. This can be followed by another sorting process
  • This dissolving of the third process initial stage takes place down to a very small speck size, so that at least 95% of the waste paper can pass through a screen perforation, for example in a disc sorter with a diameter of 10 mm.
  • the novel process described has the advantage that the pre-soaking / dissolving process can be carried out continuously and the dissolving / printing ink detaching and possibly bleaching process can be carried out so efficiently that a considerably faster and more efficient ink separation in the subsequent process stages and a considerably faster and more efficient bleaching effect can be achieved.
  • the exposure time of the chemicals becomes very long with a very high consistency, especially since the third stage also has a high consistency.
  • the preferred chemicals are 0.5 to 4% NaOH and 0.4 to 1.5% H2O2 and 0.5 to 3% water glass and 0.1 to 0.5% DTPA, related to otro entry waste paper.
  • the chemicals that are entered in the bleaching stage can be supplemented by other chemicals in the third stage, the dissolving stage.
  • the waste paper is fed in bale form via the belt conveyor 1 to the drum 2 rotating about the horizontal axis indicated by dash-dotted lines, and introduced into its entry end 3.
  • This drum is rotatably mounted on rollers 4 and driven by a motor 11 via the drive shafts shown.
  • the drum here - which is not absolutely necessary - is designed to be tiltable by a frame 10 which has a joint 9 on the left side here and a lifting cylinder 31 with a lifting rod on the right side.
  • the drive mechanism and the support parts of the drum rest on a frame 6.
  • the drum contents reach the outlet shaft 12 more or less quickly, depending on the inclination of the drum, from where the soaked quantity of paper stock is fed to a vibration sorter 14.
  • the soaking time in the drum is at least 15 minutes and generally around 30 minutes or more.
  • the coarse impurities are sorted out in the vibration sorter and fed to a receiving device 16, which can also be designed as a conveyor belt in its lower part.
  • the sorted out pulp is fed as accepted pulp via the chute 17 onto a conveyor belt 20, which maintains the waste paper pulp with the high consistency has been supplied to the pulper 21.
  • the consistency during the soaking process in the drum is at least 13%, there can be essentially even 25 to 35%, each of course based on the input of otro material.
  • the chemicals are mixed in a suitable manner with the substance in the soaking drum 3, in particular with the soaking water through line 29. Additional chemicals can also be added to the pulper 21.
  • the hole diameter of the sieve plate of the vibration sorter is between 30 and 60 mm.
  • This pulper preferably has a rotor 22 provided with a vertical shaft, which has on its circumference essentially helical, circumferentially decreasing, and possibly also narrowing, circulating ribs 23, which spiral downwards in outer diameter.
  • the shaft of the rotor is indicated at 25. Sorted out material which has preferably previously passed through a sieve plate is discharged from the material solver via the take-off nozzle 27.
  • a uniform consistency between 14 and 28% can also be used for all three process stages described.
  • the three stages shown would then be followed by further sorting stages and in particular a flotation system in order to ultimately remove the detached printing inks from the fiber suspension.
  • This would be done according to the usual method using the known flotation chemicals, such as soap or fatty acid in particular.
  • the soaking with circulating movements and the sorting and optionally the dissolving of the third stage takes place in a rotating drum with a horizontal axis of rotation with circulating and / or abrupt movements, possibly in connection with blasting and / or dropping of the waste paper.
  • the speed of the soaking drum 2 is advantageously kept low - at most 15 rpm, preferably 4 to 10, possibly less than that of the sieve drum 30 - and strongly pronounced driving ribs are dispensed with, in order to gently circulate the To have drum contents - unlike in the sorting drum 30.
  • FIG. 3 shows a variant in which soaking and sorting take place along a screw conveyor 32.
  • the shaft 33 is supported in bearings 37 and 40 and is driven by the motor 42.
  • the lower bearing 37 is supported on a bearing foundation 43.
  • the first part of the housing 31 surrounding the screw is imperforate and the second part is provided on its bottom - as indicated at 35 - with a perforated screen between 30 and 60 mm.
  • the good fiber material sorted out here is transported away by the screw 44 in the direction of a belt conveyor 52.
  • the coarse impurities to be separated go out through the shaft 51 at the end of the screw conveyor.
  • the shaft 46 of the small screw 44 is supported at the ends in bearings 48 and 49.
  • the drive is not shown here.
  • the arrangement shown can then - as shown in the other figures - be followed by a pulper or a dissolving drum with a horizontal axis of rotation.
  • the screw conveyor 32 is preferably driven in a reversing manner.
  • the bales of waste paper can be entered in an essentially undivided state.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Paper (AREA)
  • Cosmetics (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Catalysts (AREA)
  • Detergent Compositions (AREA)
  • Fertilizers (AREA)
  • Graft Or Block Polymers (AREA)

Abstract

The invention relates to a method for waste paper processing, starting at a predominantly high consistency of at least 8% in the first stages with a dissolution (soaking) including a coarse sorting stage. The invention is characterised in that, in the case of waste paper which contains a high proportion of de-inking waste paper provided with printing inks, the three first process stages, namely the soaking, coarse purification and the further, extensive dissolving of the wastepaper, in this order, are carried out with a considerable reduction of the waste paper shreds to the usual speck size at a consistency of at least 13%, and the soaking takes place with a substantial addition of dissolving chemicals, and that the waste paper is fed to the process together with essentially all the heavy impurities contained in the waste paper, such as parts of wood, glass, plastic or metal including pieces of metal ties of the waste paper bales. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren entsprechend dem Oberbegriff des Patentanspruches 1 sowie Anordnungen zur Durchführung des Verfahrens. Ein solches Verfahren ist bekannt aus der DE-OS 30 40 998. Bei diesem Verfahren erfolgt das Einweichen in einer um eine horizontale Achse rotierbaren Trommel. Als Konsistenz für den Einweichvorgang ist 20 bis 40 % angegeben. Danach wird das Altpapier mit Wasser stark verdünnt, so daß ein weiterer Sortiervorgang in einer um eine horizontale Achse rotierbaren, mit Siebperforationen versehenen Mantel ausgestatteten Trommel bei einer Konsistenz zwischen 8 und 12 % erfolgen kann. Die Lochgrößen betragen dort 4 bis 12 mm im Durchmesser.The invention relates to a method according to the preamble of claim 1 and arrangements for performing the method. Such a method is known from DE-OS 30 40 998. In this method, the soaking takes place in a drum rotatable about a horizontal axis. The consistency for the soaking process is 20 to 40%. The waste paper is then greatly diluted with water, so that a further sorting process can take place in a drum which is rotatable about a horizontal axis and provided with perforations in the screen and has a consistency of between 8 and 12%. The hole sizes are 4 to 12 mm in diameter.

Es hat sich herausgestellt, daß das Ablösen der Druckfarben von den Fasern effizienter durchgeführt werden kann, wenn das zu verarbeitende Altpapier vor dem eigentlichen Auflösen mittels Stofflöser oder Trommel mit einer Chemikalienlösung behandelt, d.h. quasi "voreingeweicht/vorimprägniert" wird.It has been found that the separation of the printing inks from the fibers can be carried out more efficiently if the waste paper to be processed is treated with a chemical solution, i.e. quasi "pre-soaked / pre-impregnated".

Bei dieser "Vorimprägnierung" werden die Druckfarbenbindemittel soweit erweicht, daß die Druckfarbenteilchen beim nachfolgenden Auflöseprozeß wirkungsvoller von den Fasern abgetrennt werden können als es ohne "Vorimprägnierung" der Fall ist. Die Vorimprägnierung erfolgt am zweckmäßigsten bei einer Konsistenz von mehr als 12 %.With this "pre-impregnation", the ink binders are softened to such an extent that the ink particles can be separated from the fibers more effectively in the subsequent dissolving process than is the case without "pre-impregnation". Pre-impregnation is best done with a consistency of more than 12%.

Die Patentschrift DE 35 22 395 C1 sieht vor, das Altpapier ebenfalls "voreinzuweichen", in einem Reaktionsturm zu stapeln und im Turmunterteil mittels Stofflöser aufzulösen, wobei grobe Verunreinigungen des Altpapiers, wie z.B. Plastikfolien, Drahtstücke und dergleichen kontinuierlich aus der Faserstoffsuspension entfernt werden.The patent specification DE 35 22 395 C1 provides that the waste paper is also "pre-soaked", stacked in a reaction tower and dissolved in the lower part of the tower by means of a cloth dissolver, whereby gross contamination of the waste paper, e.g. Plastic films, pieces of wire and the like are continuously removed from the fiber suspension.

Dieses Verfahren hat den Nachteil, daß nur ein geringer Anteil Verunreinigungen im Altpapier vorhanden sein darf, da es z.B. bei einem höheren Anteil als 1 % (bezogen auf otro Altpapier) zu Brückenbildung, Verstopfung etc. im Turmunterteil kommen kann, deren Behebung nur zeitaufwendig, verbunden mit erheblichen Produktionseinbußen, vorgenommen werden kann.This method has the disadvantage that only a small proportion of impurities may be present in the waste paper, because e.g. If the proportion is higher than 1% (based on otro waste paper), bridging, clogging, etc. can occur in the lower part of the tower, the removal of which can only be carried out in a time-consuming manner, with considerable production losses.

Die Aufgabe der Erfindung ist es, bei Aufbereitung von Altpapier, das einen sehr hohen Anteil von mit Druckfarben bedrucktem Papier enthält, die Entfernung der Druckfarben sehr effizient und wirksam durchzuführen. Dabei soll weiter keine Vorsortierung des Altpapiers nötig sein, so daß also auch alle Verunreinigungen in den Aufbereitungsprozeß gelangen dürfen. Ferner soll auch der zeitliche Aufwand und der Aufwand an Chemikalien relativ günstig sein.The object of the invention is to carry out the removal of the printing inks very efficiently and effectively when processing waste paper which contains a very high proportion of paper printed with printing inks. No further pre-sorting of the waste paper should be necessary, so that all impurities can also get into the reprocessing process. Furthermore, the expenditure of time and the expenditure of chemicals should also be relatively cheap.

Das hier beschriebene Verfahren vermeidet die obigen Nachteile, da hierbei das Verunreinigungen sowie evtl. Drahtstücke enthaltende Altpapier in einer Voreinweichtrommel bei Stoffdichten > 12 % und Temperaturen > 18° C in Anwesenheit von Chemikalien über mehr als 20 Minuten behandelt wird und die enthaltenen Grobverunreinigungen im Anschluß daran, ggf. ohne Zwischenverdünnung mittels Grobsortiertrommel, oder Grobsortiergerät (z.B. Plansortierer oder dgl. bei einer Konsistenz von mindestens 13 % (bezogen auf otro Altpapierfasern abgetrennt werden. Hierbei sind die Öffnungen (Lochungen, Schlitze etc.) so zu wählen, daß keine noch unaufgelösten Altpapierstücke mit dem Rejekt verworfen werden
Das noch unverdünnte Accept wird in einer gegebenenfalls dritten Trommel oder einem Stofflöser weiterbehandelt und pumpfähig aufgelöst, wobei dazu ggf. weitere druckfarbenablösende und oder bleichende Chemikalien zugesetzt werden können. Im Anschluß daran kann sich ein weiterer Sortiervorgang anschließen.The process described here avoids the above disadvantages, since in this case the contaminations and any waste paper containing wire pieces are treated in a pre-soaking drum at fabric densities> 12% and temperatures> 18 ° C in the presence of chemicals for more than 20 minutes and the coarse contaminants contained afterwards on this, if necessary without intermediate dilution using a coarse sorting drum or coarse sorting device (e.g. plan sorter or the like with a consistency of at least 13% (based on otro waste paper fibers unresolved pieces of waste paper are discarded with the reject
The still undiluted accept is further processed in a third drum or a fabric dissolver, if necessary, and pumpable dissolved, with additional printing ink detaching and / or bleaching chemicals possibly being added to this. This can be followed by another sorting process.

Dieses Auflösen der dritten Prozeß-Anfangsstufe erfolgt bis auf eine sehr geringe Stippengröße, so daß mindestens 95 % des Altpapiers eine Sieblochung beispielsweise in einem Scheibensortierer von 10 mm Durchmesser passieren kann.This dissolving of the third process initial stage takes place down to a very small speck size, so that at least 95% of the waste paper can pass through a screen perforation, for example in a disc sorter with a diameter of 10 mm.

Das beschriebene, neuartige Verfahren hat den Vorteil, daß der Voreinweich-/Auflöseprozeß kontinuierlich vorgenommen und der Auflöse-/Druckfarbenablöse- und evtl. Bleichprozeß so effizient durchgeführt werden kann, daß dadurch eine erheblich schnellere und effizientere Druckfarbenabtrennung in den nachfolgenden Prozeßstufen und eine erheblich schnellere und effizientere Bleichwirkung erreicht werden kann. Insbesondere durch die Verwendung von rotierenden Trommeln für die ersten beiden Stufen wird die Einwirkungszeit der Chemikalien bei sehr hoher Konsistenz günstig relativ lang, zumal auch in der dritten Stufe eine hohe Konsistenz vorliegt.The novel process described has the advantage that the pre-soaking / dissolving process can be carried out continuously and the dissolving / printing ink detaching and possibly bleaching process can be carried out so efficiently that a considerably faster and more efficient ink separation in the subsequent process stages and a considerably faster and more efficient bleaching effect can be achieved. In particular, by using rotating drums for the first two stages, the exposure time of the chemicals becomes very long with a very high consistency, especially since the third stage also has a high consistency.

Es ist ja üblich, daß das Entfernen der Druckfarben schließlich in einer Flotationsanlage erfolgt, die überwiegend mehrstufig ausgebildet ist. Die nachfolgenden Stufen der Feinsortierung und Flotation sind wegen der bekannten Ausbildung derselben nicht näher erläutert.It is common for the printing inks to finally be removed in a flotation system which is predominantly multi-stage. The subsequent stages of fine sorting and flotation are not explained in detail because of their known design.

Für den Aufbereitungsprozeß in den ersten drei Stufen kommen als Chemikalien vorzugsweise in Frage 0,5 bis 4 % NaOH sowie 0,4 bis 1,5 % H₂O₂ und 0,5 bis 3 % Wasserglas sowie 0,1 bis 0,5 % DTPA, bezogen auf otro-Eintrag Altpapier.For the preparation process in the first three stages, the preferred chemicals are 0.5 to 4% NaOH and 0.4 to 1.5% H₂O₂ and 0.5 to 3% water glass and 0.1 to 0.5% DTPA, related to otro entry waste paper.

Die Chemikalien, die in die Bleichstufe eingegeben werden, können noch ergänzt werden durch weitere Chemikalien in der dritten Stufe, der Auflösestufe.The chemicals that are entered in the bleaching stage can be supplemented by other chemicals in the third stage, the dissolving stage.

Nachfolgend wird die Erfindung anhand der in der Zeichnung prinzipmäßig dargestellten Anordnungen erläutert.The invention is explained below with reference to the arrangements shown in principle in the drawing.

Dabei stellt

  • Figur 1 prinzipmäßig eine Ansicht einer ersten erfindungsgemäßen Anordnung und
  • Figur 2 einer zweiten erfindungsgemäßen Anordnung unter Verwendung einer gelochten Siebtrommel und
  • Figur 3 eine andere Variante gemäß der Erfindung dar.
It poses
  • Figure 1 shows in principle a view of a first arrangement according to the invention and
  • Figure 2 shows a second arrangement according to the invention using a perforated drum and
  • Figure 3 shows another variant according to the invention.

Das Altpapier wird in Ballenform über den Bandförderer 1 der um die Horizontale, strichpunktiert angedeutete Achse rotierenden Trommel 2 zugeleitet, und in deren Eintragsende 3 eingeführt. Diese Trommel ist rotierbar auf Rollen 4 gelagert und durch einen Motor 11 über die dargestellten Gelenkwellen angetrieben. Die Trommel ist hier - was aber nicht unbedingt erforderlich ist - neigbar ausgebildet durch ein Gestell 10, das ein Gelenk 9 auf der hier linken Seite und einen Hubzylinder 31 mit Hubstange auf der rechten Seite aufweist. Zu dem Zweck ruhen Antriebsmechanismus und die Stützteile der Trommel auf einem Gestell 6. Somit erreicht der Trommelinhalt mehr oder weniger schnell - je nach Neigung der Trommel - den Austrittsschacht 12, von wo die eingeweichte Papierstoffmenge einem Vibrationssortierer 14 aufgegeben wird. Die Einweichzeit in der Trommel beträgt mindestens 15 Minuten und im allgemeinen um die 30 Minuten oder mehr. In dem Vibrationssortierer werden die groben Verunreinigungen aussortiert und einer Aufnahmeeinrichtung 16 zugeführt, die in ihrem unteren Teil auch als Förderband ausgebildet sein kann. Der aussortierte Faserstoff wird als Gutstoff über die Rutsche 17 auf ein Förderband 20 aufgegeben, das den Altpapierstoff mit der hohen Konsistenz, die ja beibehalten worden ist, dem Stofflöser 21 zugeführt wird. Die Konsistenz bei dem Einweichvorgang in der Trommel beträgt mindestens 13 %, es können hier im wesentlichen sogar 25 bis 35 % vorliegen, jeweils natürlich bezogen auf otro-Stoffeintrag. Die Chemikalien werden auf geeignete Weise dem Stoff in der Einweichtrommel 3 zugemischt, insbesondere mit dem Einweichwasser durch Leitung 29 zugeführt. Weitere Chemikalien können auch dem Stofflöser 21 aufgegeben werden.The waste paper is fed in bale form via the belt conveyor 1 to the drum 2 rotating about the horizontal axis indicated by dash-dotted lines, and introduced into its entry end 3. This drum is rotatably mounted on rollers 4 and driven by a motor 11 via the drive shafts shown. The drum here - which is not absolutely necessary - is designed to be tiltable by a frame 10 which has a joint 9 on the left side here and a lifting cylinder 31 with a lifting rod on the right side. For this purpose, the drive mechanism and the support parts of the drum rest on a frame 6. Thus, the drum contents reach the outlet shaft 12 more or less quickly, depending on the inclination of the drum, from where the soaked quantity of paper stock is fed to a vibration sorter 14. The soaking time in the drum is at least 15 minutes and generally around 30 minutes or more. The coarse impurities are sorted out in the vibration sorter and fed to a receiving device 16, which can also be designed as a conveyor belt in its lower part. The sorted out pulp is fed as accepted pulp via the chute 17 onto a conveyor belt 20, which maintains the waste paper pulp with the high consistency has been supplied to the pulper 21. The consistency during the soaking process in the drum is at least 13%, there can be essentially even 25 to 35%, each of course based on the input of otro material. The chemicals are mixed in a suitable manner with the substance in the soaking drum 3, in particular with the soaking water through line 29. Additional chemicals can also be added to the pulper 21.

Der Lochdurchmesser der Siebplatte des Vibrationssortierers beträgt zwischen 30 und 60 mm.The hole diameter of the sieve plate of the vibration sorter is between 30 and 60 mm.

Dieser Stofflöser weist vorzugsweise einen mit einer vertikalen Welle versehenen Rotor 22 auf, der an seinem Umfang im wesentlichen wendelförmige, nach oben sich spiralförmig im Außendurchmesser abnehmende und unter Umständen auch sich verschmälernde Umwälzrippen 23 trägt. Die Welle des Rotors ist mit 25 angedeutet. Über den Abzugsstutzen 27 wird aus dem Stofflöser aussortierter Gutstoff abgelassen, der vorher vorzugsweise eine Siebplatte passiert hat.This pulper preferably has a rotor 22 provided with a vertical shaft, which has on its circumference essentially helical, circumferentially decreasing, and possibly also narrowing, circulating ribs 23, which spiral downwards in outer diameter. The shaft of the rotor is indicated at 25. Sorted out material which has preferably previously passed through a sieve plate is discharged from the material solver via the take-off nozzle 27.

Es kann auch für alle drei beschriebenen Prozeßstufen eine einheitliche Konsistenz zwischen 14 und 28 % angewendet werden.A uniform consistency between 14 and 28% can also be used for all three process stages described.

Folgende Änderungen in der dargestellten Anordnung sind möglich:

  • 1. Anstelle des Vibrationssortierers 14 kann ebenfalls eine rotierbare Trommel 30 (siehe Fig. 2) mit perforiertem Mantel vorgesehen werden, die ebenfalls um eine horizontale Achse rotierbar ist. In diesem Falle ist wie bei der Trommel 3 das Eintragsende die eine Stirnseite und das Austragsende für die Verschmutzungen die andere Stirnseite, während der Gutstoff durch die Perforationen des Trommelmantels abgeschieden wird. Die Sieblochung beträgt dort vorzugsweise zwischen 30 und 60 mm. Auf diese Weise wird gewährleistet, daß Faserstoff nicht mit den Verschmutzungen verworfen wird.
  • 2. Anstelle des Stofflösers 25 könnte ebenfalls eine um eine horizontale Achse rotierbare Trommel vorgesehen sein, die an dem Austragsende ebenso ausgebildet ist wie die Trommel 2 und in diesem Bereich auch eine Perforation aufweisen könnte. Ist die Perforation nicht vorhanden, wäre der Austrag wie bei der Trommel 2 an der einen Stirnseite. Andernfalls könnte Gutstoff durch die Perforation und die den überwiegenden Anteil an Spuckstoff enthaltende Fraktion durch die stirnseitige Austragsöffnung abgezogen werden.
The following changes in the arrangement shown are possible:
  • 1. Instead of the vibration sorter 14, a rotatable drum 30 (see FIG. 2) with a perforated jacket can also be provided, which is also rotatable about a horizontal axis. In this case, as with the drum 3, the entry end is one end face and the discharge end for the soiling is the other end face, while the accept is separated by the perforations of the drum casing. The screen perforation there is preferably between 30 and 60 mm. In this way it is ensured that fiber material is not discarded with the contaminants.
  • 2. Instead of the pulper 25, a drum rotatable about a horizontal axis could also be provided, which is formed at the discharge end as well as the drum 2 and could also have a perforation in this area. If the perforation is not present, the discharge would be the same as for drum 2 on one end face. Otherwise, accept material could be drawn off through the perforation and the fraction containing the predominant proportion of rejects through the discharge opening on the front.

An die dargestellten drei Stufen würden sich dann weitere Sortierstufen und insbesondere eine Flotationsanlage anschließen, um letztlich die abgelösten Druckfarben aus der Fasersuspension zu entfernen. Dies würde nach dem üblichen Verfahren unter Einsatz der bekannten Flotations-Chemikalien erfolgen, wie insbesondere Seife oder Fettsäure.The three stages shown would then be followed by further sorting stages and in particular a flotation system in order to ultimately remove the detached printing inks from the fiber suspension. This would be done according to the usual method using the known flotation chemicals, such as soap or fatty acid in particular.

Es ist dabei vorzugsweise vorgesehen, daß das Einweichen unter Umwälzbewegungen und das Sortieren und gegebenenfalls das Auflösen der dritten Stufe in einer rotierenden Trommel mit horizontaler Drehachse unter Umwälz- und/oder abrupten Bewegungen, gegebenenfalls verbunden mit Hochschleudern und/oder Herabfallenlassen des Altpapiers erfolgt.It is preferably provided that the soaking with circulating movements and the sorting and optionally the dissolving of the third stage takes place in a rotating drum with a horizontal axis of rotation with circulating and / or abrupt movements, possibly in connection with blasting and / or dropping of the waste paper.

Ferner wird - um wenig Antriebsleistung aufwenden zu müssen - günstig die Drehzahl der Einweichtrommel 2 gering gehalten - höchstens 15 U/min, vorzugsweise 4 bis 10, eventuell geringer als die der Siebtrommel 30 - und auf stark ausgeprägte Mitnehmerrippen verzichtet, um eine sanfte Umwälzung des Trommelinhalts zu haben - anders als in der Sortiertrommel 30.Furthermore, in order to have to use little drive power, the speed of the soaking drum 2 is advantageously kept low - at most 15 rpm, preferably 4 to 10, possibly less than that of the sieve drum 30 - and strongly pronounced driving ribs are dispensed with, in order to gently circulate the To have drum contents - unlike in the sorting drum 30.

In Fig. 3 ist eine Variante dargestellt, bei der Einweichen und Sortieren entlang einer Förderschnecke 32 stattfindet. Deren Welle 33 ist in Lagern 37 und 40 gelagert und wird angetrieben durch den Motor 42. Das untere Lager 37 stützt sich auf einem Lagerfundament 43 ab. Der erste Teil des die Schnecke umgebenden Gehäuses 31 ist unperforiert und der zweite Teil ist an seinem Boden - wie bei 35 angedeutet - mit einer Sieblochung zwischen 30 und 60 mm versehen. Das hier aussortierte, gute Fasermaterial wird durch die Schnecke 44 abtransportiert in Richtung auf einen Bandförderer 52. Die abzuscheidenden groben Verunreinigungen gehen durch den Schacht 51 am Ende der Förderschnecke ab. Die Welle 46 der kleinen Schnecke 44 ist an den Enden in Lagern 48 und 49 gelagert. Der Antrieb ist hier nicht dargestellt. An die dargestellte Anordnung kann sich dann - wie in den anderen Figuren dargestellt - ein Stofflöser oder eine Auflösetrommel mit horizontaler Drehachse anschließen.3 shows a variant in which soaking and sorting take place along a screw conveyor 32. The shaft 33 is supported in bearings 37 and 40 and is driven by the motor 42. The lower bearing 37 is supported on a bearing foundation 43. The first part of the housing 31 surrounding the screw is imperforate and the second part is provided on its bottom - as indicated at 35 - with a perforated screen between 30 and 60 mm. The good fiber material sorted out here is transported away by the screw 44 in the direction of a belt conveyor 52. The coarse impurities to be separated go out through the shaft 51 at the end of the screw conveyor. The shaft 46 of the small screw 44 is supported at the ends in bearings 48 and 49. The drive is not shown here. The arrangement shown can then - as shown in the other figures - be followed by a pulper or a dissolving drum with a horizontal axis of rotation.

Vorzugsweise wird die Förderschnecke 32 reversierend angetrieben. Es kann ein Eintrag der Ballen von Altpapier in im wesentlichen unzerteiltem Zustand erfolgen.The screw conveyor 32 is preferably driven in a reversing manner. The bales of waste paper can be entered in an essentially undivided state.

Claims (11)

Verfahren zur Aufbereitung von bedrucktem Altpapier mit einer Nachbehandlung in einer Deinking-Anlage, bei überwiegend hoher Konsistenz von mindestens 8 % in den ersten Stufen beginnend mit der Auflösung (Einweichen) einschließlich einer Grobsortierstufe, dadurch gekennzeichnet, daß die drei ersten Prozeßstufen, nämlich in dieser Reihenfolge das Einweichen (Benetzen), das Grobreinigen durch Siebung und das weitere, umfangreiche Auflösen des Altpapiers und Ablösung der Druckfarbe bei einer Konsistenz von mindestens 13 % und das Einweichen unter erheblicher Zugabe von den üblichen Prozeßchemikalien, und zwar zu einem Anteil von mindestens 40 % der für das Auflösen des Altpapiers und das Ablösen der Druckfarben benötigten Gesamtmenge stattfindet, und daß das Altpapier einschließlich im wesentlichen aller im Altpapier enthaltenen, schwerer Verunreinigungen, wie Teile aus Holz, Glas, Kunststoff oder Metall einschließlich Stücken von Metall-Bandagen der Altpapierballen diesen Anfangsstufen zugeleitet wird.Process for the treatment of printed waste paper with a post-treatment in a deinking plant, with a predominantly high consistency of at least 8% in the first stages starting with the dissolution (soaking) including a coarse sorting stage, characterized in that the first three process stages, namely in this Sequence of soaking (wetting), rough cleaning by sieving and the further, extensive dissolving of the waste paper and detachment of the printing ink with a consistency of at least 13% and the soaking with considerable addition of the usual process chemicals, namely in a proportion of at least 40% the total amount required for the dissolution of the waste paper and the removal of the printing inks takes place, and that the waste paper, including essentially all heavy impurities contained in the waste paper, such as parts made of wood, glass, plastic or metal, including pieces of metal bandages of the waste paper bale, does so initial stages are fed. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Einweichen unter Umwälzbewegungen und das Sortieren und gegebenenfalls das Auflösen der dritten Stufe in einer rotierenden Trommel mit horizontaler Drehachse unter Umwälz- und/oder abrupten Bewegungen, gegebenenfalls verbunden mit Hochschleudern und/oder Herabfallenlassen des Altpapiers erfolgt.Method according to claim 1, characterized in that the soaking with circulating movements and the sorting and optionally the dissolving of the third stage takes place in a rotating drum with a horizontal axis of rotation with circulating and / or abrupt movements, possibly in connection with blasting and / or dropping of the waste paper . Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Sortieren in der Grobsortierstufe bei Lochgrößen zwischen 30 und 60 mm erfolgt.Method according to claim 1 or 2, characterized in that the sorting in the coarse sorting stage takes place with hole sizes between 30 and 60 mm. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß sämtliche ersten drei Aufbereitungsstufen des Altpapiers bei der gleichen Konsistenz zwischen 14 und 28 % durchgeführt werden.Method according to one of claims 1 to 3, characterized in that all the first three processing stages of the waste paper are carried out with the same consistency between 14 and 28%. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß Altpapier aufbereitet wird, das mindestens zu 80 % Druckfarbe in starkem Maße aufweist.Method according to one of claims 1 to 4, characterized in that waste paper is processed which has at least 80% printing ink to a large extent. Einrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Einweichstufe in einer um eine horizontale Achse rotierbaren Trommel durchgeführt wird, die das Altpapier in einer Zeit von mindestens 15 min. durchläuft.Device for carrying out the method according to one of claims 1 to 5, characterized in that the soaking stage is carried out in a drum rotatable about a horizontal axis, which the waste paper in a time of at least 15 min. goes through. Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß als Arbeitseinrichtung der Grobsortierstufe ein Vibrationssortierer oder eine um eine horizontale Achse rotierbare, mit einem perforierten Mantel versehene Siebsortiertrommel vorgesehen ist.Method according to claim 6, characterized in that a vibration sorter or a sieve sorting drum provided with a perforated jacket and rotatable about a horizontal axis is provided as the working device of the coarse sorting stage. Anordnung nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß für die Auflösestufe, also die dritte Stufe, ein Stofflöser vorgesehen ist, in dessen Boden oder Bodennähe ein Rotor mit einer vertikalen Achse rotierbar gehalten ist, der an seinem Umfang wendelförmige Mitnehmerelemente für die Suspension aufweist.Arrangement according to claim 6 or 7, characterized in that a pulper is provided for the dissolving stage, i.e. the third stage, in the bottom or near the bottom of which a rotor with a vertical axis is rotatably mounted, which has helical driver elements for the suspension on its circumference . Anordnung nach Anspruch 6 oder 7, dadurch gekennzeichnet, daß für die Auflösestufe, also die dritte Stufe, eine um eine horizontale Achse rotierbare Trommel mit dem Eintragsende an der einen Stirnseite und dem Austragsende an der anderen Stirnseite vorgesehen ist, deren dem Austragsende benachbarter Teil zumindest Sieböffnungen im Trommelmantel aufweist.Arrangement according to claim 6 or 7, characterized in that for the dissolving stage, that is to say the third stage, a drum rotatable about a horizontal axis is provided with the entry end on one end face and the discharge end on the other end face, the part adjacent to the discharge end at least Has sieve openings in the drum jacket. Einrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß für die Einweich- und die Sortierstufe ein Behälter (31) mit einer mehr oder weniger gegen die Horizontale geneigten, sich im wesentlichen längs des Behälters (31) erstreckenden Transportschnecke (32) vorgesehen ist, und daß der Behälter in seinem dem Abförderende der Transportschnecke (32) näheren Teil zumindest am Boden oder im Bodenbereich eine Siebperforation (35) aufweist.Device for carrying out the method according to one of claims 1 to 5, characterized in that for the soaking and sorting stage, a container (31) with a more or less inclined to the horizontal, extending substantially along the container (31) screw conveyor (32) is provided, and that the container in its part closer to the discharge end of the transport screw (32) has a perforated screen (35) at least on the floor or in the floor area. Anordnung nach Anspruch 10, dadurch gekennzeichnet, daß eine kleinere Transportschnecke (44) unterhalb des Behälterbodens im Bereich des Siebteils (35) desselben angeordnet ist.Arrangement according to claim 10, characterized in that a smaller transport screw (44) is arranged below the container bottom in the area of the sieve part (35) thereof.
EP19910119108 1990-11-23 1991-11-09 Method and installation for waste paper processing Expired - Lifetime EP0486904B1 (en)

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DE4037230A DE4037230A1 (en) 1990-11-23 1990-11-23 METHOD AND SYSTEM FOR THE PROCESSING OF WASTE PAPER
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0732442A2 (en) 1995-03-17 1996-09-18 Voith Sulzer Stoffaufbereitung GmbH Process for treating waste paper and apparatus for its application
US6083350A (en) * 1996-03-01 2000-07-04 Voith Sulzer Stoffaufbereitung Gmbh System for treatment of waste paper having a pulping drum and a perforated sorting area
EP1118706A2 (en) * 2000-01-14 2001-07-25 Georgia-Pacific Corporation Method for removing contaminants from fibers in recycle fiber pulping
EP1205596A1 (en) * 2000-11-14 2002-05-15 Voith Paper Patent GmbH Process for treating waste paper containing impureties
EP1253237A2 (en) * 2001-04-27 2002-10-30 Voith Paper Patent GmbH Process and apparatus for the preparation of additives, especially for papermaking
WO2002090651A1 (en) * 2001-05-08 2002-11-14 Alpha Calcit Füllstoff Gesellschaft Mbh Method for recycling pulp rejects
EP1627950A1 (en) * 2004-07-16 2006-02-22 Andritz AG Process for pulping of contaminated wastepaper
WO2009056178A1 (en) * 2007-10-30 2009-05-07 Voith Patent Gmbh Method for the production of calcium carbonate in a fiber suspension
CN103170495A (en) * 2013-03-14 2013-06-26 福建益源废物利用股份有限公司 Method and system for recovering waste paper solid wastes

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6001218A (en) 1994-06-29 1999-12-14 Kimberly-Clark Worldwide, Inc. Production of soft paper products from old newspaper
US6074527A (en) 1994-06-29 2000-06-13 Kimberly-Clark Worldwide, Inc. Production of soft paper products from coarse cellulosic fibers
US5582681A (en) 1994-06-29 1996-12-10 Kimberly-Clark Corporation Production of soft paper products from old newspaper
AU5744496A (en) * 1995-05-18 1996-11-29 International Paper Company Pulping apparatus and related method for recycling paper
US6296736B1 (en) 1997-10-30 2001-10-02 Kimberly-Clark Worldwide, Inc. Process for modifying pulp from recycled newspapers
US6387210B1 (en) 1998-09-30 2002-05-14 Kimberly-Clark Worldwide, Inc. Method of making sanitary paper product from coarse fibers
JP2004211276A (en) * 2002-11-15 2004-07-29 Aikawa Iron Works Co Ltd Disaggregation apparatus for papermaking raw material and method for disaggregation papermaking raw material
CA2737128A1 (en) * 2008-09-25 2010-04-01 Herbert Gunther Joachim Langner Horizontal re-pulping apparatus for cellulose fibres
JP2014025158A (en) * 2012-07-25 2014-02-06 Relief Niigata Co Method for producing wet ground pulp
HK1177382A2 (en) * 2012-12-21 2013-08-23 Li Tong H K Telecom Company Ltd A system and method for processing objects having chemical contaminates
CN105926336B (en) * 2016-05-30 2018-05-15 周玉平 A kind of regenerated paper making pulping device and method
CN111570470A (en) * 2020-05-13 2020-08-25 崔锦霞 Digital product processing and recycling device
CN113089356B (en) * 2021-04-30 2023-08-25 安德里茨（中国）有限公司 Pulping system for waste paper

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028658A1 (en) * 1979-11-08 1981-05-20 Hermann Finckh Maschinenfabrik GmbH & Co. Process and apparatus for treating waste paper
DE3149135A1 (en) * 1981-12-11 1983-06-23 Escher Wyss Gmbh, 7980 Ravensburg Process for disintegrating waste paper in the thick stuff range
DE3332389A1 (en) * 1982-09-15 1984-03-15 dollard Karton B.V., 9693 Nieuweschans Process and equipment for producing paper or cardboard
DE3425270A1 (en) * 1983-07-12 1985-01-24 A. Ahlström Oy, Noormarkku Process and equipment for dissolving and pumping cellulose mass or waste paper
EP0233517A2 (en) * 1986-02-19 1987-08-26 Hermann Finckh Maschinenfabrik GmbH &amp; Co. Process and apparatus for deinking paper pulp obtained from waste paper
US4812205A (en) * 1988-01-25 1989-03-14 Beloit Corporation Process for secondary fibre processing

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2941898A1 (en) * 1979-10-17 1981-04-30 Hermann Finckh, Maschinenfabrik GmbH & Co, 7417 Pfullingen METHOD AND DEVICE FOR PROCESSING WASTE PAPER
DE3114527C1 (en) * 1981-04-10 1982-10-14 J.M. Voith Gmbh, 7920 Heidenheim Process for the treatment of waste paper
DE3144561C2 (en) * 1981-11-10 1985-05-02 Feldmühle AG, 4000 Düsseldorf Process for deinking pulp suspensions
DE3221932A1 (en) * 1982-06-11 1983-12-15 J.M. Voith Gmbh, 7920 Heidenheim PLANT FOR RECYCLING PAPER
DE3311082A1 (en) * 1983-03-26 1984-09-27 J.M. Voith Gmbh, 7920 Heidenheim METHOD AND DEVICE FOR DISPOSAL OF A FABRIC LOSS
US4622099A (en) * 1983-12-02 1986-11-11 J. M. Voith Gmbh Method and apparatus for manufacturing paper and boards
DE3522395C1 (en) * 1985-06-22 1986-11-20 J.M. Voith Gmbh, 7920 Heidenheim Process and arrangement for processing waste paper
DE3737466A1 (en) * 1987-11-05 1989-05-18 Teves Gmbh Alfred BRAKE PRESSURE CONTROL DEVICE

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028658A1 (en) * 1979-11-08 1981-05-20 Hermann Finckh Maschinenfabrik GmbH & Co. Process and apparatus for treating waste paper
DE3149135A1 (en) * 1981-12-11 1983-06-23 Escher Wyss Gmbh, 7980 Ravensburg Process for disintegrating waste paper in the thick stuff range
DE3332389A1 (en) * 1982-09-15 1984-03-15 dollard Karton B.V., 9693 Nieuweschans Process and equipment for producing paper or cardboard
DE3425270A1 (en) * 1983-07-12 1985-01-24 A. Ahlström Oy, Noormarkku Process and equipment for dissolving and pumping cellulose mass or waste paper
EP0233517A2 (en) * 1986-02-19 1987-08-26 Hermann Finckh Maschinenfabrik GmbH &amp; Co. Process and apparatus for deinking paper pulp obtained from waste paper
US4812205A (en) * 1988-01-25 1989-03-14 Beloit Corporation Process for secondary fibre processing

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0732442A2 (en) 1995-03-17 1996-09-18 Voith Sulzer Stoffaufbereitung GmbH Process for treating waste paper and apparatus for its application
DE19509789A1 (en) * 1995-03-17 1996-09-19 Voith Sulzer Stoffaufbereitung Process for the treatment of waste paper and annex to its implementation
EP0732442A3 (en) * 1995-03-17 1997-11-05 Voith Sulzer Stoffaufbereitung GmbH Process for treating waste paper and apparatus for its application
US6083350A (en) * 1996-03-01 2000-07-04 Voith Sulzer Stoffaufbereitung Gmbh System for treatment of waste paper having a pulping drum and a perforated sorting area
EP1118706A2 (en) * 2000-01-14 2001-07-25 Georgia-Pacific Corporation Method for removing contaminants from fibers in recycle fiber pulping
EP1118706A3 (en) * 2000-01-14 2002-05-08 Georgia-Pacific Corporation Method for removing contaminants from fibers in recycle fiber pulping
US6458240B1 (en) 2000-01-14 2002-10-01 Georgia-Pacific Corporation Method for removing contaminants from fibers in recycle fiber pulping
EP1205596A1 (en) * 2000-11-14 2002-05-15 Voith Paper Patent GmbH Process for treating waste paper containing impureties
EP1253237A2 (en) * 2001-04-27 2002-10-30 Voith Paper Patent GmbH Process and apparatus for the preparation of additives, especially for papermaking
EP1253237A3 (en) * 2001-04-27 2003-01-22 Voith Paper Patent GmbH Process and apparatus for the preparation of additives, especially for papermaking
WO2002090651A1 (en) * 2001-05-08 2002-11-14 Alpha Calcit Füllstoff Gesellschaft Mbh Method for recycling pulp rejects
AU2002235867B2 (en) * 2001-05-08 2006-12-14 Alpha Calcit Fullstoff Gesellschaft Mbh Method for recycling pulp rejects
EP1627950A1 (en) * 2004-07-16 2006-02-22 Andritz AG Process for pulping of contaminated wastepaper
WO2009056178A1 (en) * 2007-10-30 2009-05-07 Voith Patent Gmbh Method for the production of calcium carbonate in a fiber suspension
CN103170495A (en) * 2013-03-14 2013-06-26 福建益源废物利用股份有限公司 Method and system for recovering waste paper solid wastes
CN103170495B (en) * 2013-03-14 2016-04-06 福建益源废物利用股份有限公司 A kind of recovery method of waste paper solid waste and recovery system

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NO914554L (en) 1992-05-25
FI915486A (en) 1992-05-24
NO178772C (en) 1996-05-29
CA2056051A1 (en) 1992-05-24
TW204384B (en) 1993-04-21
ATE124737T1 (en) 1995-07-15
EP0486904B1 (en) 1995-07-05
FI915486A0 (en) 1991-11-21
DE59105926D1 (en) 1995-08-10
KR920010077A (en) 1992-06-26
ES2074629T3 (en) 1995-09-16
FI105211B (en) 2000-06-30
NO178772B (en) 1996-02-19
BR9105068A (en) 1992-08-18
JPH05106180A (en) 1993-04-27
DE4037230A1 (en) 1992-05-27
NO914554D0 (en) 1991-11-21
US5334285A (en) 1994-08-02

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